GE PanaFlow MV80, Руководство пользователя

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Chapter 5. Troubleshooting and Repair
112 PanaFlow™ MV80 & MV82 User’s Manual
5.1.1 Level One Hidden Diagnostics Values (cont.)
•
Ck = Calculated Ck at current operating conditions. Ck is a variable in the equation that relates signal strength,
density, and velocity for a given application. It is used for noise rejection purposes.
Ck
directly controls the
fi
value (see above). If the
Ck
is set too low (in the calibration menu), then the
fi
value will be too low and the
vortex signal will be rejected resulting in zero flow rate being displayed. The calculated Ck value in this menu
can be compared to the actual
Ck
setting in the calibration menu to help determine if the
Ck
setting is correct.
•
Lvl
= Threshold level. If the Low Flow Cutoff in the calibration menu is set above this value, the meter will
read zero flow. The
Lvl
level can be checked at no flow. At no flow, the
Lvl
must be below the Low Flow Cutoff
setting or the meter will have an output at no flow.
•
Adj. Filter
= Adjustable filter. Displays the filtering in decibels. Normally reads zero. If this value is
consistently –5 or –10, for example, the
Ck
or density setting may be wrong.
•
Iso. Power Volts
= Nominally 2.7 VDC. If less than this, check the flowmeter input power.
•
O,I
= Factory use only.
•
Pulse Out Queue
= Pulse output queue. This value will accumulate if the totalizer is accumulating faster than
the pulse output hardware can function. The queue will allow the pulses to “catch up” later if the flow rate
decreases. A better practice is to slow down the totalizer pulse by increasing the value in the (unit)/pulse
setting in the totalizer menu.
•
TOF, G, f
= Factory use only.
•
Sig. Rev
= Signal board hardware and firmware revision.
•
Miro Rev
= Microprocessor board hardware and firmware revision.
•
AD, R, T, F, PT, V = Factory use only.
•
SPI Err, Rcv, Sent = Factory use only.
•
ISR Diagnostic
= Factory use only.
•
Power Fail
= Factory use only.
•
External Power
= Factory use only.
•
External Alarm = Factory use only.
•
Display CG, PWR = Factory use only.
•
Internal Temperature
= Electronics temperature.